E.i. Dupont De Nemours and Company

Other

E.i. Du Pont De Nmeours and Company

David Herbert Roach

Lap-Tak Andrew Cheng

Robert Joseph Bouchard

Kurt Richard Mikeska

Paul Douglas Vernooy

Carmine C Torardi

John Gerard Lavin

Zhigang Rick Li

Kenneth Warren Hang

Adam Fennimore

Lap-Tap Andrew Cheng

John Gerald Lavin

A conductive paste composition contains a source of an electrically conductive metal, an alkaline-earth-metal boron tellurium oxide, and an organic vehicle. An article such as a high-efficiency photovoltaic cell is formed by a process of deposition of the paste composition on a semiconductor device substrate (e.g., by screen printing) and firing the paste to remove the organic vehicle and sinter the metal and establish electrical contact between it and the device.

Process for forming an electrically conductive structure on a substrate

A conductive paste composition contains a source of an electrically conductive metal, a Ti&#x2014;Te&#x2014;Li oxide, and an organic vehicle. An article such as a high-efficiency photovoltaic cell is formed by a process of deposition of the paste composition on a semiconductor substrate (e.g., by screen printing) and firing the paste to remove the organic vehicle and sinter the metal and establish electrical contact between it and the device.

Conductive paste composition and semiconductor devices made therewith

This invention provides a process for improving the field emission of an electron field emitter comprised of an acicular emitting substance such as acicular carbon, an acicular semiconductor, an acicular metal or a mixture thereof, comprising applying a force to the surface of the electron field emitter wherein the force results in the removal of a portion of the electron field emitter thereby forming a new surface of the electron field emitter.

Process for improving the emission of electron field emitters

A method is disclosed for the manufacture of a powdered polyimide extrudate for use as a purge media. The method includes feeding a polyimide film material into an extruder having a first zone that provides heating and a subsequent second zone that provides endothermic shearing. In one embodiment, the resulting purge media comprises a sheared polyimide powder having an average particle size in a range of about 5 to 100 microns (or any sub-range thereof). The purge media can comprises up to 35 weight percent other additives.

Polyimide based purge media and methods relating thereto

This invention provides a dielectric composition comprising a dielectric which is fireable in air at a temperature in the range of about 450&#xb0; C. to about 550&#xb0; C. and a conductive oxide selected from the group consisting of antimony-doped tin oxide, tin-doped indium oxide, a transition metal oxide which has mixed valence states or will form mixed valence states after firing in a nitrogen atmosphere at a temperature in the range of about 450&#xb0; C. to about 550&#xb0; C. and normally conducting precious metal oxides such as ruthenium dioxide, wherein the amount of conductive oxide present is from about 0.25 wt % to about 25 wt % of the total weight of dielectric and conductive oxide. This dielectric composition has reduced electrical resistance and is useful in electron field emission devices to eliminate charging of the dielectric in the vicinity of the electron emitter and the effect of static charge induced field emission.

Dielectric composition with reduced resistance

A field emission device in which a protecting vapor is present in an evacuated space between a field emission cathode assembly and an anode. The protecting vapor may be one or more hydrogen-containing gases such as a gas containing M&#x2014;H bonds where M may be C, Si, B, Al or P.

Field emission device with protecting vapor

This invention provides compositions of matter that contain an electron emitting substance and an expansion material. The expansion material may, for example, be an intercalation compound. When a film is formed from the composition, expansion of the expansion material typically causes rupturing or fracturing of the film. No further treatment of the surface of the film is typically required after expansion of the expansion material to obtain good emission properties. A surface formed from such a fractured film acts as an efficient electron field emitter and thus is useful in vacuum microelectronic devices.

Electron emitter composition made of an electron emitting substance and an expansion material for expansion of the electron emitting substance

Alloyed nanophenes comprising carbon, boron, and a Group V element other than nitrogen are provided. The alloyed nanophenes are useful, for example, as miniature electronic components, such as wires, coils, schottky barriers, diodes, inductors, memory elements, and other circuit devices and elements.

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Hockessin, DE, United States of America

David Herbert Roach